Version->0.0.2.
Make gem file list git-independent.

This enables rake build for testing before commiting.
Extract version-checking code.

Make version-checking a mix-in so it can be called from command and also from
action hooks.
Add version checking action and hooks.

* Add action that mixes in version checking
* Add plugin load of that action
* Add hooks to check version before provisioning on
    - vagrant up
    - vagrant reload
    - vagrant provision
Version->0.0.3.
Update readme.